Twins can have different parents. A fertility expert explains A surrogate mother gave birth to twins who belong to two entirely different families Health Just now
The Queensland case is a striking variation on this theme: not two fathers through intercourse, but one pregnancy combining an IVF embryo transfer and a natural conception in the same ovulation window.
In natural conception, there are two kinds: identical (monozygotic) twins occur when a single embryo splits after fertilisation into two separate embryos.
The aim is to “persuade” the surrogate’s body that the embryo is the product of a natural cycle, improving the odds of a successful pregnancy.
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